function toggle(uid) {
  item = document.getElementById(uid);
  image = document.getElementById("img-" + uid);
  if (item.style.display == "none"){
	  item.style.display = "";
    image.setAttribute('src', 'media/minus.gif');
  } else {
	  item.style.display = "none";
    image.setAttribute('src', 'media/plus.gif');
  }
  return false;
}

